Dam



Tj BECHER March 16, 1937.

DAM

Filed Sept. 18, 1935 2 Sheets-Sheet 1 March 16, 1937. T, BECHE'R 2,073,956

' DAM I Filed Sept. 18, 1955 Sheets-Sheet 2 Patented Mar. 16, 1937 UNITED STATES PATENT oFFlcE 'to Maschinenfabrik lfiugs'b*urg-Nurnlnrg A. GL', Nuremberg, Germany, a corporationy of- Ger- Application September 18, 1935, Serial No. 41,079

` 1 In Germany September 27, 1934 s claims.y (o1. sir-x) As. elegge means, for weirs. often times trapsare veeg Wraith re'lrneeel te 'tire bottom, ef the verraad permit the reesegeei e Smaller. er Iereer atterrit ef Water, eeeerdine es. the. flee het been :5; lifted e eli-lets.

` favorable in. mehr respettt` ere al. @tithe-belly epswhehrequire e drive at only e` end thereof by reason of their tor# sional -stre I gth and are suited for weirs of conxli) siderable length. 1

Mounting s ,uch flaps upon stationary we irs or 11.19914. Wallsthe tep er Crest 0f which iS diseeti at. et te ifdereble height above the betteln weirs, net eerrrleeted with ditulties, but matters are Qtherwee if the axle 0f, the.A flap. is leeetertneer the. betteln. ef the Weir;A es in this al cavity must be providedA which receives firm.. in. erelerte. prevent Ilirrdreriee ef nei/if eet, rt discharge ef. high. weterfend the like- ;29 Send. shingle.' entlthe like eellett in' Seid Cevities, and may give trouble to the proper service Qi theweir- Similar @with the etere-mentioned, freir-belly titties et? flaps, are;y other matters with Seme other .elenstraetierel ferme. er flaps., mention. .Qfrhieh can be omitted.

It is known to. remove the shingle, mud, andthev like by means of scavenging.

'I'he present invention relates to improved constructional form operating with scavenging, and the gist of the invention resides in that a slot extending across the entire breadth of the river, etc., and communicating at its upper side with the head water and terminating at its lower side into a bottom cavity is provided, whereby the possibility is presented to conduct water from said slot into said cavity, in order to scavenge away the shingle etc. The said slot may commence directly at the head water side of the bottom of the weir, or a separate channel may be provided which communicates with the head water. shuttingoi members may also be provided for regulating the amount of the scavenging water. It is suited to the purpose in view to positively actuate the respective member from the flap of the weir, so that at certain distinct positions of the nap the scavenging commences or ceases automatically, as the case may be.

In the accompanying drawings:- Figure 1 is a vertical transverse section of a weir and flap associated therewith showing one i form of the invention, the flap being shown in raised position; 4

Fig. 2 is a view of the structure shown in Fig. 1, showing the iiap in its lowered position;

Fig. 3 is a section of a portion of a weir and flap, showing another form of the invention, the iiapbeing shown in' raised position; o

`Figli is a view of the structure shown in Fig. 3, showing the flap in its lowered position;

l Fig. 5 is a view similar to Fig. 3, illustrating another form of the invention;

Fig. 6 isa view` similar to Fig. 4 of the structure shown in Fig. '5.` v

Fig. 7 is a view similar to Fig. 3 of a third modined form of the invention; and

Fig. 8 is a View similar to Fig. 4 of the structure shown in Fig. 7.

Referring to Figs.4 1 and 2, a-denotes the flap which resembles,v in transverse section, a shsbelly and is hinged to. the bottom 7c of the Weir at the head water side of the same. The flap is shown in two positions, viz. in full lines and in dotted lines. In the rst of these positions the nap i's in its highest position, whereas the other position indicates the normal position of the flap.

A passage iis formed in the Weir and extends from, the` bottom lc to the bottom of the cavityb.

A slide Z is provided at the entrance end of the passage i; and said slide is connected with theiiap'a., by means of a linl;` m.

An aperture-is formed in the slide l` through which head water can flow into the passagei when the flap is in its highest position, as shown by the full lines, Fig. 1. In the normal position of the iiap a (position a" Fig. 1) and in any other lower position of the iiap, even in its lowermost position (position a', Fig. 2), the position of the slide Z is such that the entrance to passage i is closed.

In the form of the invention shown in Figs. 3 and 4, the scavenging passage n is by far shorter than the passage z shown in Figs. 1 and 2, and the closing slide o is located nearer to the flap a.

Counter, however, to the form of the invention shown in Figs. 1 and 2, the passage n is closed by the slide o when the flap a is in its highest position (Fig. 3) and said slide is open when the flap is in its lower or lowermost position (Fig. 4), so that the shingles, etc., are driven away by the water rushing down through the slotted member or grating s (Fig. 4) into the main current and are at once carried away by the same.

In the form of the invention shown in Figs. 5 and 6, the iiap q has a downwardly projecting eX- tension r which closes the discharge slot n when the ap is in its lower or lowermost position, as in Fig. 6, whereas otherwise (Fig. 5) said slot is open so that the scavenging water can rush down into the cavity b. At the upper portion of the slot p there is a stationary slotted grating s' which is mounted on the stationary dam structure and projects outwardly towards the flap q. When the flap q is in raised position (Fig. and the entrance to the slot p open, the grating s is adapted to function as a screen for preventing large particles of foreign matter from passing down into the cavity b. When the flap is lowered (Fig. 6) the extension r engages the bottom tion through the slot p.

In Figs. 7 and 8, the arrangement and combination of the parts is the reverse of those shown in Figs. 5 and 6, in that the extension 1" keeps the discharge or scavenging slot p closed when the ap q' is in its upper position (Fig. '7) and is open when the ap q' is in its lower position, as in Fig. 8. Mounted on the dam at a point out of the way of the swinging extension r and adjacent to the entrance to the slot p, is a grating or the like. s.

The member designated by s, s and s in all of the views is a screen or rake-like grating by which shingle, etc. that has been carried along the bottom of the river is prevented from passing down into the cavity b. In the constructional forms of the invention shown in Figs. l to 4 inclusive the member s constitutes a separate member arranged in front of the discharge or scavenging slot and operatively connected with the flap so as to move therewith. In the forms of the invention shown in Figs. 5 to 8 inclusive, the grating is stationary and projects outwardly from the main dam structure.

I claim:

l. The combination with a main dam struct-ure having an upper portion and a lower portion formed on the bed of a stream, with a wall connecting both portions, the lower portion being disposed downstream with respect to the upper portion of the dam structure and forming a cavity extending across the bed of the stream at the rear or downstream side of said wall, of a movable flap hingedly connected along one edge to the upper portion of the dam structure adjacent to said wall, said ap being adapted to normally project upwardly from the upper portion of the' main dam structure to dam up the wat-er in the stream and being adapted when swung downwardly to be disposed within the cavity on the downstream side of said wall, a passage formed in the dam structure and connecting the pool on the upstream side of said flap with the cavity, and means operatively connected to said flap and mounted in the dam y structure at the entrance to said passage for of the grating s', thereby cutting off communica.- n

controlling communication through the passage.

2. A dam comprising an upper portion and a lower portion formed on the bed of a stream, a wall connecting both portions, the lower portion being disposed downstream with respect to the upper portion and constituting a cavity extending across the bed of the stream at the rear or downstream side of said Wall, a movable flap hingedly connected along one edge to the upper portion of the dam adjacent to said wall, said lap being adapted when swung downwardly to be disposed within said cavity, a slot formed in the dam on the upstream side of said ap, said slot being coextensive with said flap through which water can 110W into said cavity from the head water, a slide coextensive with said slot and disposed at the entrance to said slot for controlling communication therethrough, and means operatively connecting said slide with said ap for actuating said slide in accordance with the relative position of said ap.

3. A dam comprising an upper portion and a lower portion, a wall connecting both portions, the lower portion being disposed downstream with respect to the upper portion and constituting a cavity extending across the dam at the rear or downstream side of said wall, a movable flap hingedly connected to the dam adjacent said wall, said iiap being adapted when swung downwardly to be disposed within said cavity, a passage coextensive with said ap and located between the flap and the dam through which water can flow into said cavity from the head water, and means operatively connected to said ap and disposed at the entrance to said passage for controlling communication through the passage.

TI-IEODOR BECI-IER. 

